Dyestuffs of the phthalocyanine series and a process of producing same



aran ne w a p Patented Apr. 6, 1954 SAME scams arm A PROCESS oF-im'onUc Arnold Taitt'er, Lanibsheim, Germany, "assignm- & Soda-Fabrik Aktiento :Ba'dische Ai1ilingesellsehaft; Ludwigs "'Nq'lJi-awing. Application December hafen (Rhine), Germany Serial N 0. 201,865

' -Glaimsvpniority, application G m n December 29, 1949 Claims. (Cl.-260--3-1l.5)

This invention relates to dyestuiis of the phthalocyanine series and a process, of producsame.

:1 have found that new dyestuiis of thephthalocyanine series are obtained by reacting phthalo- 2 ll-$ re am of E ie-d Crafts condensing agents.

initialmaterialsthere-may be .used for 1 exam met l r m tebeeeiamm' hal cyanines, as for example those of copper, cobalt, nickel or iron, and also their substitution products, as for example those @Qntaining halogen atoms or nitro, carbamido, sulfamide, phenyl or benzyl groups. Among suitable lactones there may be mentioned for example gamma-butyrolactone, gammaor delta-valerolactone and higher homologues. The Friedel-Crafts condensing agents, as for example the halides of aluminum, zinc or iron, and boron fluoride, may also be used in the form of their addition compounds with lactones, as for example butyrolactoneboron fluoride.

The reaction may be carried out in the presence of a solvent or diluent, such as trior tetrachlorbenzene. A large excess of the lactone employed may also serve as the solvent or diluent. It is advantageous to carry out the reaction in molten aluminum chloride, the melting point of which may be adjusted to the desired temperature for example by the addition of alkali halides or tertiary amines.

Depending on the reaction conditions and the proportions of the reactants, products are obtained having a lower or higher content of carboxyl groups, for example of butyric acid radicles in the case of gamma-butyrolactone. The new phthalocyanines may be used in part as vat dyestuffs and in part as substantive dyestuffs.

The following examples will further illustrate the invention but the invention is not restricted to these examples. The parts are by weight.

Example 1 20 parts of cobalt phthalocyanine are introduced at 150 C. while stirring into amelt of 200 parts of anhydrous aluminum chloride and 50 parts of sodium chloride and then 40 parts of gamma-butyrolactone are allowed to drop in. After stirring for several hours at 150 C1, the reaction mixture is poured into ice-water and the precipitated dyestufi. is filtered ofi by suction, washed with water and dried. 27 parts of a dyestuif are thus obtained which dyes cotton from a brown vat fast blue shades.

70 parts of triethylamine may be used instead of 50 parts of sodium chloride :and the reaction may be carried out at6,0 or 100 Emma! 'Into 250 parts vof at 100 0., 50 parts of gamma-butyrolactone are allowed to drop in. After 6 hours the melt at a temperature of 100 C. is poured into ice-water.

Example 3 300 parts of anhydrous aluminum chloride, parts of sodium chloride and 30 parts of metalfree phthalocyanine are fused together. 60 parts of gamma-butyrolactone are allowed to flow into the melt at 120 C. After some hours, the resulting dyestuil is separated in the manner described in Example 1. It dyes cotton from a violet-blue vat green shades.

Eatample 4 30 parts of copper phthalocyanine are introduced into 300 parts of a melt of anhydrous aluminum chloride and sodium chloride and then parts of gamma-butyrolactone are added dropwise at 150 C. The mixture is stirred for about 10 hours at 150 C. and then cooled to C. and poured into ice-water. The :blue substantive dyestufi thus obtained dyes cotton blue shades.

Example 5 Into C.

Example 6 A mixture of 300 parts of trichlorobenzene,

.catalyst of Eriedel-Crafts parts of finely powdered cobalt phthalocyanine, 10 parts of anhydrous zinc chloride and parts of gamma-butyrolactone is heated at C. for about 8 hours while stirring. The solid product is then filtered 011 by suction, washed wit aqueous alcohol and water and dried. The product may be further purified by dissolution in concentrated sulfuric acid and pouring the solution into water. When stirred with a little water it yields a paste which dyes cotton from the vat blue shades.

Example 7 30 parts of anhydrous aluminum chloride or of a mixture of anhydrous iron and zinc chlorides are introduced at C. into a suspension of 20 parts of copper phthalocyanine in 200 parts of gamma-butyrolactone. The mixture is stirred for about 15 hours at the said temperature and is then poured acid; the residue is filtered off by suction, washed with water and made into a paste after the addition of a little caustic alkali solution. The resulting dyestufi dyes cotton from a neutral bath blue shades.

What I claim is:

1. A process for the production of dyestuffs of the phthalocyanine series which comprises reacting a phthalocyanine in the presence of a type at temperatures from 60 C. to C. with lactones selected from the class consisting of gamma-butyrolactone and gammaand delta valerolactone.

into dilute hydrochloric 2. A process for the production of dyestuffs oi the phthalocyanine series-which comprises reacting a metal phthalocyanine in the presence of a catalyst of Friedel-Crafts type at temperatures from 60 C. to 180 C. with lactones selected from the class consisting of gamma-butyrolactone, gammaand delta-valerolactone.

3. A process for the production of dyestufis oi the phthalocyanine series which comprises reacting a metal phthalocyanine in a melt of anhydrous aluminum chloride at temperatures from 60 C. to 180 C. with lactones selected from the class consisting of gamma-butyrolactone, gammaand delta-valerolactone.

4. A process for the production of dyestuffs of the phthalocyanine series which comprises reacting a metal phthalocyanine in a melt of anhydrous aluminum chloride and a melting point depressing compound at temperatures from 60 C. to 180 C. with lactones selected from the class consisting of gamma-butyrolactone, gammaand delta-'valerolactone.

5. A process for the production of dyestuffsoi the phthalocyanine series which comprises reacting a metal phthalocyanine in a hydrous aluminum chloride and an alkali metal salt at temperatures from 60 C. to 180 C. with lactones selected from the class consisting of gamma-butyrolactone, gammaand delta-Valerolactone.

No references cited. 

1. A PROCESS FOR THE PRODUCTION OF DYESTUFFS OF THE PHTHALOCYANINE SERIES WHICH COMPRISES REACTING A PHTHALOCYANINE IN THE PRESENCE OF A CATALYST OF FRIEDEL-CRAFTS TYPE AT TEMPERATURES FROM 60* C. TO 180* C. WITH LACTONES SELECTED FROM THE CLASS CONSISTING OF GAMMA-BUTYROLACTONE AND GAMMA- AND DELTA VALEROLACTONE. 